Far-sight out-of-focus lens and out-of-focus glasses
By designing a hyper -view outer illegal lens, its lens ontology has a ring -shaped separation area with a gradual decrease in bending, solving the problem that the existing technology cannot meet the requirements of low cost and mass production, and realizes effective correction of the vision vision.
Patent Information
- Application Number
- CN202420962681.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-07
AI Technical Summary
In the prior art, only ordinary old light aspherical lenses can be used to correct hyperopic vision, and cannot meet the requirements of low-cost and large-scale production.
A long -sized outer outer focus lens is designed. The lens on the body includes the front and the rear surface. The front surface is set with a convex surface, and the rear surface is set. The curve of the ring -shaped departure area gradually decreases from the inner ring to the outer ring.
Through the design of the out -of -focus lens, it can achieve an effective correction of the visual vision of hyperopia with low cost and large -scale production, and meet the vision correction needs of the hyperopia group.
Smart Images
Figure CN222420695U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of glasses, in particular to a hyperopic external defocus lens and defocus glasses. Background Art
[0002] Glasses are a combination of lenses and frames, used to improve vision, protect eyes or for decorative purposes. Glasses can correct a variety of vision problems, including myopia, hyperopia, astigmatism, presbyopia, strabismus or amblyopia. Among them, defocus glasses are a type of glasses, which are designed based on the defocus principle at the periphery of the lens, so that after wearing the glasses, the object will form a defocus of the peripheral retina in the eye, so as to control the change of the eye axis through the defocus image. The defocus glasses in the prior art are all myopia defocus glasses, which are used for vision correction of myopic groups, but when facing hyperopic groups, only ordinary presbyopic aspherical lenses can be used in testing and research, which cannot meet the requirements of low-cost and large-scale production. Utility Model Content
[0003] The utility model aims to provide a hyperopic external defocus lens and defocus glasses to solve the problem that only ordinary presbyopic aspherical lenses can be used in existing testing and research, which cannot meet the requirements of low-cost and large-scale production.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] On the one hand, the utility model provides a hyperopic exofocus lens, which includes a lens body, wherein the lens body includes a front surface and a rear surface arranged back to back, the front surface is convex, and the rear surface is concave; the front surface is provided with a central area, an annular defocus area and an edge area from the center to the outside, and the curvature of the annular defocus area is gradually decreased from the inner ring to the outer ring; the front surface is used for processing and molding according to a mold, and the rear surface is used for processing and molding according to a prescription.
[0006] As an optional solution of the above-mentioned hyperopic extra-defocus lens, the diameter range of the above-mentioned central area is 5mm to 12mm, and the curvature of the above-mentioned central area is any curvature value between +5D and +16D.
[0007] As an optional solution of the above-mentioned hyperopic extra-defocus lens, the curvature of the above-mentioned central area has an error variation.
[0008] As an optional solution for the above-mentioned hyperopic external defocus lens, the range of the above-mentioned error variation is -0.3D to +0.3D.
[0009] As an optional solution of the above-mentioned hyperopic external defocus lens, the width of the annular defocus area minus the diameter of the central area is in the range of 5 mm to 25 mm.
[0010] As an optional solution of the above-mentioned hyperopic external defocus lens, the total reduction value range of the above-mentioned annular defocus area when it gradually decreases is 4D to 8D.
[0011] As an optional solution of the above-mentioned hyperopic extra-defocus lens, the curvature of the above-mentioned edge region is reduced, and the curvature reduction range of the above-mentioned edge region is 0 to 4D.
[0012] As an optional solution for the above-mentioned hyperopic external defocus lens, the cross-section of the above-mentioned lens body is crescent-shaped.
[0013] As an optional solution for the above-mentioned hyperopic external defocus lens, the above-mentioned rear surface is a spherical surface or a cylindrical surface or a spherical cylindrical surface.
[0014] On the other hand, the utility model provides a defocused glasses, including the hyperopic external defocused lens as described above, the defocused glasses further including a frame, and the edge area of the lens body is arranged on the frame.
[0015] The beneficial effects of the utility model are:
[0016] The hyperopic external defocus lens comprises a lens body, and the lens body comprises a front surface and a rear surface which are arranged opposite to each other, the front surface is arranged in a convex surface, and the rear surface is arranged in a concave surface, so that the lens body has the ability to correct vision. Among them, the front surface is arranged with a central area, an annular defocus area and an edge area from the center to the outside, and the curvature of the annular defocus area is arranged to gradually decrease from the inner ring to the outer ring, so that when an object is observed through the lens body, the object will form a hyperopic defocus of the peripheral retina in the eye, and at the same time, the front surface is used for processing and forming according to the mold, so the front surface with the annular defocus area can be processed and manufactured in large quantities at low cost, and the rear surface is used for processing and forming according to the prescription, and there is no need to consider setting the annular defocus area, so the hyperopic external defocus lens can meet the requirements of low cost and large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of the side structure of a hyperopic external defocus lens provided by an embodiment of the utility model;
[0018] Figure 2 This is a schematic structural diagram of the front surface of a hyperopic external defocus lens provided by an embodiment of the utility model.
[0019] In the figure:
[0020] 1. Lens body; 11. Front surface; 111. Central area; 112. Annular defocus area; 113. Edge area; 12. Back surface. DETAILED DESCRIPTION
[0021] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0025] This embodiment provides a hyperopic external defocus lens for correcting the patient's vision.
[0026] like Figure 1 and Figure 2 As shown, the hyperopic external defocus lens comprises a lens body 1, which comprises a front surface 11 and a rear surface 12 arranged opposite to each other, wherein the front surface 11 is convex and the rear surface 12 is concave, so that the lens body 1 has the ability to correct vision.
[0027] Among them, the front surface 11 is provided with a central area 111, an annular defocusing area 112 and an edge area 113 from the center to the outside, and the curvature of the annular defocusing area 112 is gradually reduced from the inner ring to the outer ring, so that when observing an object through the lens body 1, the object will form a hyperopic defocus of the peripheral retina in the eye, and at the same time, the front surface 11 is used for processing and forming according to the mold, so the front surface 11 with the annular defocusing area 112 can be processed and manufactured in large quantities at low cost, and the rear surface 12 is used for processing and forming according to the prescription, and there is no need to consider setting the annular defocusing area 112, so the hyperopic external defocus lens can meet the requirements of low cost and large-scale production. Optionally, the rear surface 12 is a spherical surface or a cylindrical surface or a spherical cylindrical surface, which is less difficult to manufacture according to the prescription requirements, and can further meet the requirements of low cost and large-scale production of hyperopic external defocus lenses.
[0028] Furthermore, the diameter of the central area 111 ranges from 5 mm to 12 mm, and the curvature of the central area 111 is any curvature value from +5D to +16D, so that after matching with the rear surface 12, it can provide a refractive power for correction, so that the hyperopic defocus lens can achieve a normal correction function and meet customer needs. Among them, the curvature of the central area 111 has an error variation, so that the processing difficulty of the central area 111 can be reduced. Optionally, the error variation ranges from -0.3D to +0.3D, so as to control the error within a smaller variation value, thereby ensuring the stability of the central luminosity of the hyperopic defocus lens.
[0029] Furthermore, the width of the annular defocusing area 112 minus the diameter of the central area 111 is in the range of 5 mm to 25 mm, so that the annular defocusing area 112 has a sufficient width to facilitate the gradual decrease of the curvature from the inner ring to the outer ring and meet customer needs. Specifically, the total reduction value of the annular defocusing area 112 when it gradually decreases is in the range of 4D to 8D, so that the curvature of the annular defocusing area 112 of the front surface 11 is gradually reduced, so as to control the peripheral hyperopic defocus and ensure the stability of the hyperopic defocus.
[0030] Further, the curvature of the edge region 113 is reduced, and the curvature reduction range of the edge region 113 is 0-4D, so that the thickness of the lens body 1 and the reference curvature of the front surface 11 are reduced by the curvature change of the edge region 113, and the overall weight of the lens body 1 is reduced, making it lighter, more comfortable and more beautiful to wear. Optionally, the cross section of the lens body 1 is crescent-shaped, so that the curvature setting of the front surface 11 and the rear surface 12 can be facilitated, and the curvature change can be controlled.
[0031] In a specific embodiment, a lens body 1 with a diameter of 65 mm is processed using a material with a refractive index of 1.60, and an annular defocus area 112 is located on the front surface 11 of the lens body 1. The curvature in the central area 111 with a diameter of 6 mm on the front surface 11 is +10.0D. Within the range of the annular defocus area 112 of 6 mm to 25 mm, the curvature gradually decreases from +10.0D to +4.0D, and the curvature in the edge area 113 outside 25 mm gradually stabilizes at about +2.0D. The back surface 12 is processed into a spherical surface with a curvature of -2.0D. In this way, a hyperopic outer defocus lens with a central diopter of +8.0D is realized, and the central thickness can be reduced by 30%-50%.
[0032] The present embodiment also provides a defocus glasses, including the hyperopic external defocus lenses as described above, the defocus glasses also including a frame, the edge area 113 of the lens body 1 is arranged in the frame, so that the defocus glasses can correct vision so that objects in the eye will form a hyperopic defocus of the peripheral retina, so as to control the change of the eye axis through the hyperopic defocus image, wherein the shape of the edge area 113 can be adjusted according to the frame.
[0033] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A hyperopic external defocus lens, characterized in that: The lens body (1) comprises a front surface (11) and a rear surface (12) arranged in opposite directions, wherein the front surface (11) is convex and the rear surface (12) is concave; the front surface (11) is provided with a central area (111), an annular defocusing area (112) and an edge area (113) from the center to the outside, and the curvature of the annular defocusing area (112) is gradually reduced from the inner ring to the outer ring; the front surface (11) is used for processing and molding according to a mold, and the rear surface (12) is used for processing and molding according to a prescription.
2. The hyperopic external defocus lens according to claim 1, characterized in that: The diameter of the central area (111) ranges from 5 mm to 12 mm, and the curvature of the central area (111) is any curvature value between +5D and +16D.
3. The hyperopic external defocus lens according to claim 2, characterized in that: The curvature of the central area (111) has an error variation.
4. The hyperopic external defocus lens according to claim 3, characterized in that: The error variation ranges from -0.3D to +0.3D.
5. The hyperopic external defocus lens according to claim 1, characterized in that: The width of the annular defocusing area (112) minus the diameter of the central area (111) is in the range of 5 mm to 25 mm.
6. The hyperopic external defocus lens according to claim 5, characterized in that: The total reduction value range of the annular defocus area (112) when it gradually decreases is 4D to 8D.
7. The hyperopic external defocus lens according to claim 1, characterized in that: The curvature of the edge region (113) is reduced, and the curvature reduction range of the edge region (113) is 0 to 4D.
8. The hyperopic external defocus lens according to any one of claims 1 to 7, characterized in that: The cross section of the lens body (1) is crescent-shaped.
9. The hyperopic external defocus lens according to any one of claims 1 to 7, characterized in that: The rear surface (12) is a spherical surface, a cylindrical surface, or a spherical cylindrical surface.
10. A defocused glasses, characterized in that: The hyperopic defocused glasses comprise the hyperopic external defocused glasses as claimed in any one of claims 1 to 9, wherein the defocused glasses further comprise a frame, and the edge area (113) of the lens body (1) is arranged on the frame.